Combined cooling and heating system with four solenoid valves



March 6, 1962 F. J. SCHORDINE COMBINED COOLING AND HEATING SYSTEM WITHFOUR SOLENOID VALVES Filed Jan. 25, 1960 45 2 INVENTOR.

3,023,592 COMBINED COOLEWG I-EATING SYSTEM WITH FOUR SOLENOID VALVESFred J. Schordine, 134 Waverly Ave, Patchogue, N.Y. Filed Jan. 25, 1960,Ser. No. 4,346 4 Claims. (til. 62324) The present invention relates toimprovements in heat pump systems adapted for cooling and heating and,more specifically, it relates to a new and improved system of this typewhich can be used also as a defrosting device for any refrigerationsystem.

Hitherto these heat pump systems have required complicated four-wayvalves of special construction which were difiicult to exchange,expensive to install, heavy, space requiring, and usually not soreliable in operation as to give satisfaction to users for considerableperiods of time.

Therefore, one object of the present invention is the pro vision of acooling and heating system of the character described which instead ofan expensive four-way valve uses only four ordinary, simple solenoidvalves that will control the heating and cooling of the system and thatalso can be used for defrosting any refrigeration system at any settemperature. Moreover, my new and improved system can be used inconnect-ion with any size, model, make or unit in the field ofrefrigeration or air conditioning, either automatical or manual.

Another object of the present invention is the provision of a coolingand heating system of the character described which is highly reliableand fool-proof in operation, and which in the service field will savetime and money to the user, which allows a simple, fast and easyexchange of any one of the solenoid valves, and which makes it possiblefor service personnel to keep on hand only standard solenoid valves,instead of high-priced special valves as has been necessary before myinvention.

A further object of the present invention is the provision of a coolingand heating system of the character described which can be used on anycondensing unit, for winter heating and summer cooling, all in one heatpump system, and which is durable and well adapted to withstand therough usage to which devices of this type ordinarily are subjected.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangements of parts without departingfrom the spirit of the invention as claimed.

In the accompanying drawing a preferred form of the invention has beenshown.

In said drawing the single figure is a schematic illustration of apreferred embodiment of my invention.

In the drawing the numerals 1, 2, 3 and 4 denote four separate solenoidvalves, which may be of standard construction, and the numeral 5 denotesa compressor, which may be of any suitable type or construction. Onlyone compressor 5 is necessary for the cooling and heating cycles. T hecompressor 5 has an outlet 7 and an inlet 10. The outlet 7 is connectedby a pipe line 11 to branch lines 15 and 16, which terminate at thesolenoid valves 1 and 2 respectively, while the inlet is connected by aline 17 to branch lines 21 and 22 which terminate at the solenoid valves3 and 4 respectively.

The solenoid valve 1 controls a line 23, which is divided at 24 intobranch lines 25 and 27. The branch line 25 leads to, and is controlledby, the valve 3, whereas the branch line 27 leads to a condenser 29.

The valve 2 controls a line 30, which is divided at 31 into branch lines32 and 33. The line 32 leads to, and is tates Patent 0 controlled by,the valve 4, whereas the line 33 leads to a coil 34 of a tray 35.

A line 37 connects the end of the coil 34 to a coil 38 of a unit 39, anda reduced line 40 connects the lower end of the coil 38 to the condenser29.

During a heating cycle the unit 39 is a heating unit, and the solenoidvalves 2 and 3 are open, while the solenoid valves 1 and 4 are closed,so that a heating medium will flow from the outlet 7 of the compressor 5through the lines 11 and 16, the valve 2, the line 33, the coil 34, theline 37, the coil 38, the reduced line 40, the condenser 29, the lines27 and 25, the valve 3, and the lines 21 and 17 to the inlet 10 of thecompressor 5.

During the cooling cycle the unit 39 is an evaporator unit, and thesolenoid valves 1 and 4 are open, while the solenoid valves 2 and 3 areclosed, so that a cooling medium will flow from the outlet 7 of thecompressor 5 through the lines 11 and 15, the valve 1, the line 27, thecondenser 29, the reduced line 40, the coil 38, the line 37, the coil34, the lines 33 and 32, the valve 4, and the lines 22 and 17 to theinlet 10 of the compressor 5.

The tray 35 is heated to melt ice and snow at the bottom of the unit 39,so that water derived from the melting will accumulate at the bottom ofthe tray 35, from where it can be drained ofi.

The solenoid valves 1, 2, 3 and 4 in the present instance are soconstructed that they open when energized, and a wiring diagram for thewiring of these valves is shown in the drawing. There it will be seenthat a pair of main wires 41 and 42 connect a source of electric current(not shown) to two pairs of branch wires 43 and 44 as well as 45 and 47which are connected to circuit breakers 50 and 51 respectively. Thecircuit breakers 50 and 51 may be any suitable switches that areoperated manually or automatically or thermostatically. If both switches50 and 51 are open, as shown, the valves 1, 2, 3 and 4 are closed, andthe system does not operate. If the switch 50 is closed and the switch51 is open, the valves 2 and 3 are open, and the valves 1 and 4 areclosed so that the heating cycle can openate as referred tohereinbefore. If the switch 51 is open and the switch 50 is closed, thevalves 1 and 4 are open, and the valves 2 and 3 are closed. so that thecooling cycle can operate.

The switch 50 is connected by wires 53 and 54 to the solenoid of thevalve 2, and by wires 55 and 57, which branch off the wires 53 and 54-respectively, to the solenoid of the valve 3. The switch 51 is connectedby wires and 61 to the valve 1, and by wires 62 and 63, which branch oiithe wires 60 and 61 respectively, to the solenoid of the valve 4.

Since certain changes may be made in the above article and differentembodiments of the invention could be made without departing from thescope thereof, it is intended that all matter contained in the abovedescription or shown in the accompanying drawing shall be interpreted asillustrative and not in a limiting sense.

It is also to be understood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention which as amatter of language might be said to fall therebetween.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent is:

1. A combined cooling and heating system comprising a compressor, acondenser coil, an evaporator coil, a tray beneath said evaporator, anauxiliary coil connected to said evaporator coil and extended throughsaid tray, a first pipe line connected to an outlet of said compressorand forming two branches, 2. second pipe line connected to an intake ofsaid compressor and forming two branches, a solenoid valve mounted intoeach one of the branch lines of the first and the second pipe line andcontrolling a branch line, a pair of third pipe lines connecting theends of the branch lines of said first pipe line to the ends of thebranch lines of said second pipe line, a fourth pipe line connecting oneof said third pipe lines to said auxiliary coil, a reduced lineconnecting said evaporator to said condenser, a fifth pipe lineconnecting said condenser to one of said third pipe lines and electricalcircuits connected to said solenoid valves for energizing the same.

2. A combined cooling and heating system comprising a compressor, acondenser coil, an evaporator coil, a tray beneath said evaporator coil,an auxiliary coil extending through said tray, a rectangle formed bypipe portions having a pair of parallel longitudinal pipe portions and apair of short pipe portions, a first pair of shut-01f valves in spacedrelation to each other being provided in a first one of saidlongitudinal pipe portions, a second pair of shut-off valves in spacedrelation to each other being provided in asecond one of saidlongitudinal pipe portions, a feed pipe connecting a section of saidfirst longitudinal pipe portion intermediate said first pair of shut-01fvalves to an outlet of said compressor, a return pipe connecting asection of said second longitudinal pipe portion intermediate saidsecond pair of shut-off valves to an inlet of said compressor, a firstconnection pipe connecting one end of said first longitudinal pipeportion to one end of said condenser, a second connection pipeconnecting the other end of said first longitudinal pipe portion to oneend of said auxiliary coil, a third connection pipe connecting the otherend of said auxiliary coil to one terminal of said evaporator, and areduced pipe connecting the other end of said evaporator to saidcondenser.

3. A combined cooling and heating system comprisising a compressor, afirst heat exchanger, a second heat exchanger, a drip tray mountedbeneath said second heat exchanger, a third heat exchanger arranged insaid tray, two pairs of shut-off valves of which a first pair isconnected to the intake of said compressor and a second pair isconnected to the exhaust of said compressor, a pair of first conduitseach of which connecting one of said first valves to one of said secondvalves, a second conduit connecting one end of said first heat exchangerto one of said first conduits, a third conduit connecting one end ofsaid third heat exchanger to the other one of said first conduits, afourth conduit connecting the other end of said third heat exchanger toone end of said second heat exchanger, and a reduced pipe expansionextending the other end of said second heat exchanger to said first heatexchanger.

4. A combined cooling and heating system comprising a compressor, afirst heat exchanger, four solenoid shut-oh valves, a second heatexchanger, a drip tray for collecting moisture and frost removed fromsaid second heat exchanger, a third heat exchanger extended through saidtray, T-conduits connecting said valves to the intake and the exhaust ofsaid compressor as Well as to one end of each one of said first andthird heat exchanger, a pipe connecting the other end of said third heatexchanger to one end of said second heat exchanger, a reduced pipeexpansion connecting the other end of said second heat exchanger to theother end of said first heat exchanger, and electrical means forenergizing said solenoid valves independently of each other foralternatingly opening and closing the same.

References Cited in the file of this patent UNITED STATES PATENTS2,428,876 Hawkins Oct. 14, 1947 2,441,885 Kemler May 18, 1948 2,589,384Hopkins Mar. 18, 1952 2,653,453 Williams Sept. 29, 1953 2,955,439 PinterOct. 11, 1960 FOREIGN PATENTS 1,200,393 France June 29, 1959

